Abstract: The present invention is a coin jamming detecting device including a pulse generator for generating pulses at time intervals corresponding to the operation cycle of a coin moving section which operates to move coins delivered thereto from a coin supplying section into a coin storing section, a timer circuit for producing an abnormal signal when the time interval becomes longer than a predetermined period, and a drive control circuit which upon reception of the abnormal signal, operates to stop the coin supplying section, and the coin moving section.

Abstract: A sheet comparing system, in which comparison between a number of sheets to be counted and an actually counted number of the sheets is carried out so that noise signals other than the signals required to carry out the comparison are excluded. A simple comparator circuit adapted for the sheet comparing system is also disclosed.

Abstract: A sheet counting machine has a sheet counting mechanism which is controlled through a coincidence detecting circuit operating to compare a number of sheets counted with a predetermined number of sheets. The coincidence detecting circuit is provided with a mode changing switch and an inverter connected thereto in the output path to relatively reverse a logical level of an output of the coincidence detecting circuit stop mode. The logical level thus relatively reversed is utilized for controlling the operation of the mechanism through switching elements and relay elements.

Abstract: A money dispenser is provided with first and second detectors for detecting a bank note passing therethrough, the first detector being disposed at the money loading side of a money conveyer and the second detector being disposed at the money unloading side of the same so that a money dispensing operation is checked twice as to whether an amount of money actually dispensed is coincident with an amount of money registered to be dispensed. Furthermore, according to another aspect of this invention, the money dispenser is provided with display units which indicate the amount dispensed until the next money dispensing operation starts.